# US 12,004,172 B2 · User terminal and radio communication method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,004,172 B2 - Document ID: US12004172B2 - Status: Granted - Kind: B2 - Application number: 17/295,954 - Filed: 2018-11-22 - Published: 2022-01-06 - Granted: 2024-06-04 - Earliest claimed: 2018-11-22 - Assignees: Ntt Docomo, Inc. - Applicants: Ntt Docomo, Inc. - Inventors: Kazuki Takeda; Satoshi Nagata; Lihui Wang; Shaozhen Guo - Web page: https://patentgrep.com/patent/US12004172B2 ## CPC - H04W 72/23: in the downlink direction of a wireless link, i.e. towards a terminal - H04L 5/14: Two-way operation using the same type of signal, i.e. duplex - H04W 72/0446: Resources in time domain, e.g. slots or frames - H04W 72/1263: Mapping of traffic onto schedule, e.g. scheduled allocation or multiplexing of flows - H04W: WIRELESS COMMUNICATION NETWORKS (broadcast communication H04H; communication systems using wireless links for non-selective communication, e.g. wireless extensions H04M1/72) - H04L: TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION (arrangements common to telegraphic and telephonic communication H04M) ## Abstract To appropriately control half-duplex communication in a future radio communication system, one aspect of a user terminal according to the present disclosure includes: a reception section that receives slot format information that indicates a slot format of a cell; and a control section, when transmission and reception in transmission directions are instructed, performs control to perform transmission and reception in a given cell and to not perform transmission and reception in another cell based on a method for instructing transmission and reception in each cell, the transmission directions being different between a plurality of cells for which slot formats are configured to flexible. ## Claims ### Claim 1 A terminal comprising: a transmitter that reports capability information indicating that a half-duplex operation is applied among multiple cells; a receiver that receives information regarding a slot format of a first cell; and a processor that, when the half-duplex operation is applied, expects, in a symbol where transmission or reception on the first cell is indicated by the information regarding the slot format, that transmission or reception in a direction that is different from the first cell is not indicated to a second cell, or controls, in the symbol, not to perform transmission or reception on the first cell, wherein when transmission or reception in the symbol is configured by higher layer signaling for the first cell and transmission or reception in a direction that is different from the first cell is indicated, by downlink control information, to the second cell in the symbol, the processor controls not to perform transmission or reception on the first cell. ### Claim 2 (depends on 1) The terminal according to claim 1, wherein the first cell is defined as a reference cell with a smallest index. ### Claim 3 (depends on 1) The terminal according to claim 1, wherein when transmission or reception in the symbol is configured by higher layer signaling for the first cell, the processor expects that transmission or reception in a direction that is different from the first cell is not indicated, by downlink control information, to the second cell in the symbol. ### Claim 4 (depends on 1) The terminal according to claim 1, wherein when transmission or reception in the symbol is configured by first downlink control information for the first cell, the processor expects that transmission or reception in a direction that is different from the first cell is not indicated, by second downlink control information, to the second cell in the symbol. ### Claim 5 A radio communication method for a terminal, comprising: reporting capability information indicating that a half-duplex operation is applied among multiple cells; receiving information regarding a slot format of a first cell; when the half-duplex operation is applied, expecting, in a symbol where transmission or reception on the first cell is indicated by the information regarding the slot format, that transmission or reception in a direction that is different from the first cell is not indicated to a second cell, or controlling, in the symbol, not to perform transmission or reception on the first cell; and when transmission or reception in the symbol is configured by higher layer signaling for the first cell and transmission or reception in a direction that is different from the first cell is indicated, by downlink control information, to the second cell in the symbol, controlling not to perform transmission or reception on the first cell. ### Claim 6 A system comprising a terminal and a base station, wherein the terminal comprises: a transmitter that reports capability information indicating that a half-duplex operation is applied among multiple cells; a receiver that receives information regarding a slot format of a first cell; and a processor that, when the half-duplex operation is applied, expects, in a symbol where transmission or reception on the first cell is indicated by the information regarding the slot format, that transmission or reception in a direction that is different from the first cell is not indicated to a second cell, or controls, in the symbol, not to perform transmission or reception on the first cell, wherein when transmission or reception in the symbol is configured by higher layer signaling for the first cell and transmission or reception in a direction that is different from the first cell is indicated, by downlink control information, to the second cell in the symbol, the processor controls not to perform transmission or reception on the first cell, and the base station comprises: a receiver that receives the capability information; and a transmitter that transmits the information regarding the slot format.